@charset "UTF-8";
/* CSS Document */

body {
		/*居中*/
		margin: 0;
        padding: 0;
		width: 1400px;
		min-height: 100%;
        font: 12px Helvetica;	
     }
	.middle {
		display: flex;
		flex-direction: column;
		width: 1400px;
		height: 800px;
		background: #DEDEDE;
	}
	.nav {
		width: 1400px;
		height: 60px;
		display: inline-flex;
		flex-direction: row;
		background-color:black;
		font-size: 14px;
		color: aliceblue;
	}
	.left_menu {
		text-align: center;
		line-height: 50px;
		height: 50px;
		padding: 5px 5px;
		font-size: 20px;
		font-color: #BFEFFF;
	}
	ul li {	
		/*为了不显示出列表前面的点*/
		list-style: none;
		display:inline-block;
	}
	.white {
		height: 100px;
	}
	.signup{
		display: flex;
		flex-direction: column;
		width: 400px;
		height: 500px;
		border-radius: 10px;
		margin:0 auto;
   	    background: #ffffff;
	}
	.signup_main {
		margin:0 auto;
		width: 300px; 
		height: 200px;
		text-align: center;
	}
	.signup_main button{
		width: 300px;
    	height: 35px;
		text-align: center;
		border-radius: 5px;
	}
	.footer {
		background: #DEDEDE;
		left: 0;
		right: 0;
		bottom:0;
		text-align: center;
	}	
	.btn-info{
		width:300px;
		border-radius:15px;
	}
	.btn-info:focus{
		outline:none;
	}
	.btn-info:hover{
		transition: 0.2s;
	}
